Suction governor



June 23, 1942.

R. HUI-FORD j SUCTION GOVERNOR 4 Sheets-Sheet 2 Filed Oct. 22, 1938INVENTOR m Lm W ,rO un. A D m m June l23, 1942. v R. HUFFORD sucTIoNGOVERNOR 'Filed Oct. 22, 1938 4 Smets-Sheet 5 INVENTOR.

June 23, R HUFFORD SUCTION GOVERNOR Filed oct. 22, 1938` 4 Sheets-Sheet4 .Ilma Idd Ell Kmwa/v BY y Patented June 23, 1942 UNITED- STATE sPATENT OFFICE sric'rloN GovEmioa i Raymond Burford, Anderson, ma.Applioation october 22,1938, serial No. 236,395 i zo claims.l (c1.137-152) This invention relates to an automatic governor for controllingthe speed of an internal combustion engine by controlling the fuelsupply thereto; l

The ohiefobjeot of this invention is to pro! vide a flexible andfoolproof automatic governor adapted to control the speed of an internalcombustion engine by controlling the fuel supply thereto.

The .chief feature of the invention consists in. providing a governorstructure capable of accomplishing the foregoing object.

Another object of the invention is to provide a governor structure whichcan be adjusted over a long range of engine speeds without sacrificingengine performance at any governed speed.

Another feature of -the invention is the arl rangement of the operativeparts of the governor such that if an attempt be made to render thegovernorinoperative in the customary manner heretofore employed withprevious governors, said attemptwill. be not only fruitless but will onthe contrary reduce the maximum governed speed.

One outstanding characteristic of the present invention as distinguishedfrom previous governor structures of velocity type, is the inclusion ofa stem or plunger which opposes ,the closing movement of the vfuelcontrol valve. This is thel reverse of the usual governor practice. Itis 'an arrangement that makestlie instant invention' tampern-proof.

` The invention herein disclosed is illustrated as of two basicembodiments and one of these embodiments is illustrated in twosub-generic forms. Other objects and features of the invention will beset forth more fully hereinafter.

The full nature of the invention will be understood from theaccompanying drawings and the following description and claims:

In the drawings, Fig. 1 is a side elevational view of a governorembodied as an adaptor for inclusion in the fuel supply to an internalcombustion engine, the cover being removed'.

Fig. 2 is atop plan view thereof, a portion of the casing being brokenaway to show other parts in detail.

Fig. 3 is, an end elevation of the governor shown in Figs. '1 and 2 andlooking toward the' right in said figures.

Fig. 4 is a view similar to Fig. 1 and of a slightly more-modiledform ofthe invention,

\Fig. 5 is a view similar to Fig. .2 and of the san'le form `of theinvention shown in Fig. 4.

Fig. 6 is a'view similar to Fig. 4 and of the' in detail.

,Fig. 11 is side elevational view of the in-cl vention sho n in Fig.10,'the cover portion being omitted.

same form of the invention but in another operative position.

Fig. 7 is aview similar to Fig. 3 and of the form of the invention shownin Figs. 4 to 6.

Fig. 8 is a sectional view taken on line 8 8 of A Fig. '7 and in thdirection of the arrows.

'Fig. 9 is -a sectional view taken on line 9-9 of Fig. v5 and in thedirection of the arrows.

Fig. 10 is a view similar' to Figs. 2 and 5 and of a second basic formof theinvention, parts of the casing4 being broken away to show otherparts iFig. 12 is a view similar to Fig.' 11 butshowing the parts inanother operative position, the disclosures in Figs.. 11 and 12corresponding respectively to the disclosures in Figs. 6 and 4, re-

spectively,

Fig. 13 isa chart of valve position plotted .against opposed force ortorque of .the invention with the cam adjusted for 1500, 2000 and 2500R. P. M. control.

Fig. 14 is a chart of valve position plottedagainst vacuum in inches foran engine held to 1500, 2000 and 2500 R.' P. M.

- Fig. 15 isa chart similar to Fig. 13 of prior art devices wherein theca'm is non-adjustable.

Fig. 16 is a plan view of an anti-friction type lever and link structuresimilar lto that rillustrated in Figs. 1, 4 and 6.

Fig. 17 is an elevational view of 'same similar to that disclosed inFigs. 2. and 5.

ISI)

.subject to engine suction and fuel velocity.

In offcenter or eccentric relation and extending across the passage Illathrough the tubular portion I0 is a shaft .I4 which suitably supports asat I5 an elliptical valve IS.- This valve is so mounted that the longend thereof is on the upstream sidev of the shaft axis so that the valveis responsive tothe downstream owof the fuel mixture. Such a valve isknownas .an unbalanced valve. The shaftj at one end is suitably showingthe parts A within the structure 24.

supported in an anti-friction structure indicated by the numeral I1,mounted in a boss I3. The

other end of the valve shaft .I4 is similarly supported as at I9 in aboss structure 26 that terminates ina plate portion 2|. Therplateportion 2| is provided with a side wall arrangement indicated generallyby the numeral 22 to form a chamber 29 and the face of said wall istapped and threaded as at 23 forcover mounting.-

Suitably secured. to one end of the wall 22 -and to the boss portion 26as by an integral formation is a housing structure 24 provided with acap 25 at its outer end and-suitably secured thereto as at 26.-Reference will be had more fully hereinafter tothe mechanism andarrangement of parts The platev portion 2| is suitably 'apertured as at21 and 29 and mounted within the chamber 29 are the members 30 and 3|which are tapped Aandthreaded, said members being secured .in theopenings 21 and 26, respectively.

Projecting outwardly from the side wall opposite the portion 24, is theportion 32. The side wall is threaded as at 3i and an adjusting screw 34is mounted in said threaded aperture and the head portion thereof isnested v.within the cham ber 35 formed in the portion 32.

An'adjusting screw 36- suitably secures an arm `structure 31 to thesupport 36.` An 'adjusting screw 38 suitably secures a structure 39 tothe support 3|. The structure 39 has a bearing portion 46 of anyconventional form. It bears on the head'91a of thearm 31. The-member 3 9after once being adjusted, is a statlonaryelementv insofar as governorsubsequent use and operation is concerned.

Arm 31 is adjusted to the desired position by means of the bolt 34.'I'he opposite end of the arm is apertured as at 31h and has anchoredto. it one end of a spring 4|, the other end of which is suitablyanchored to a. pin 42 carried by a pair of spaced links 43. -These links43 'also carry a pivot 44 which mounts a roller 45 betweenl the linksand this roller is adapted to engage the portion, face or surface 46 ofdesired conformation by reason of the constraint imposed by the Theshape of the portion 46 is determined by the amount of sprlng resistancerequired from spring 4| to balance the turning eii'o'rt o f the valvel-I6 lessthe amount of the opposing effort of the power. pistonoperatively associated therewith, as hereinafter set-forth. Generallyvthis surface 46 is shaped to' change `the direction of ltravel of thelink structure 43.as the arm 41 through the roller 59 is tilted landthis action accelerates the extension of the spring 4I the desired andpredetermined amount, determinable by the formationof the surface 46. Asillustrated the effective surface 46 is of modified sine character andhence is termed sinusoidal surface."

The two links 43 straddle the arm 41 rigid with the end of .the shaft I4exposed within rthe chamber 29. 'I'hese links are secured to said arm asat 48. The arm 41 on the face remote from the plate 2| mounts a pivot 49in turn supporting a roller 0.

It will be understood the surface 31a of .the arm 31 may be of anydesired conformation, likewise portion 40. Adjustment of the bolt 34thus simultaneously adjusts the position of the cam 39 and the effectiveanchor point for the end of the spring 4Iand. therefore, the tension ofsaid spring. The arrangement ofthe parts is such that the governor maybe adjusted so that it may be said to maintain any predetermined speedfrom, for example, 1,500 R. P. M. to 3,000 R. P. M. and give verysatisfactoryV performance through 5 this entire range and naturally, ofcourse, give satisfactory performance at the set speed within thatrange. After this adjustment is effected, the retaining screws 36 and-33 are tightened down to maintain cam 39 and arm 31 stationary.

the sinusoidal faced member 39 may be provided without departing fromthe broader fea- 15 tures of the invention.

-There is formed within the body extension 24 a cylinder 5| in which ismounted a piston 52, the stem 53 of which constitutes a plunger. Thisstem has its end slidably supported in the. aperture 53a formed in thewall 22 of the casing of tion 54 and encircling the plunger stem is acoil `spring 55, the piston bearing end thereof being seated within theskirt portion, the opposite end tured, the same "being, a continuationof the aperture 53a. As shown in Figs. 1 and 2, the

wall 5Ia may have. an externally threaded sleeve so that the force ofthespring 55 may be 'adjusted to that desired or required.

An extension 56 on the piston constitutes a stop. If desired the endthereof may support a cushion member 51 for cushioning cap contact. Thiseliminates noise and that would bethe sole Apurpose of such an addition.The extension 56,

however, Idoes normally space the piston4 from the cap 25 when thepiston is in its extreme right hand position. 'I'hisforms a chamber onthe right hand side of ,the piston with which the 'passage 59communicates. Another passage 59 451s an extension and communicates asat'60 with the fuel passage Illa-see Fig. 1--the passages and ports 56,59 and 60 vconstituting -the'pow'er see Fig. l and Fig. 3-that opensupon the left hand wall of the cylinder 5I and thereby subjects thepiston 52 to the force of vacuum below vthe valve I6. Chamber 29 isprovided with a cover 63 and is sealed by gasket 29a and the same.

are secured to the face of the side walls 22 by screws 63a or the like.'I'he resulting construction is such that one end of the piston issubjected to the pressure through conduit lila of the f downstream sideof the valve I6 by means of the vacuum arrangement 6|2962.

The amount 'ofresistng effort desired to oppose the turning effort ofthe valve I6 through the 65 lever 41 and roller 50 by the said piston 52or rather the plunger portion thereof, can be controlled by the area ofthe piston and the rate of the power spring 55 opposing the effort ofthe piston 52. 'Ihe outer end of the power piston 52 is subjected to thepressure on the upstream side of the valve I6 through` the passagearrangement 584-59-60. v

Piston' 52 is controlled entirely by the pressure -within the conduitIlla. 'One end is subjected vto the pressure on the downstream side ofthe gov- Hg to 20 aaszos to 2.5" Hg while the pressure on thedownstreamv side of valve I6 will vary from approximately .5" vacuum inHg. It is this differential of pressures that piston 52 issubjected tothat assists in balancing the effort or torque on the valve I6, when thegovernor is in control of the engine and the carburetor throttle valveis wide open. l

However, when the carburetor valve is moved towards aY closed position,the pressure on both sides of the valve I6 becomes more evenly balanced,thus rendering piston 52 less effective.

The torque on the valve I6- has 'also been reduced but not in the sameproportions as that on the piston 52 so it is still impossible to exceedy the predetermined governor speedjby manipulation of the carburetorthrottle or choke.

It is to be observed the offset or unbalanced valve I6 is eccentricallymounted in the conduit |a so that it is responsive to fuel mixture flow'and tends to move by reason thereof into a 'closing direction.

Reference will be had to Figs. 4 to 9, inclusive,

- wherein a similarly but more complicated form of thev invention isillustrated. In said figures, numerals of the .|00 series similar tonumerals previously utilized in the primary series, designate parts vinthis modification identical to or similar to parts designated by theprimary series in Figs. 1 to 3, inclusive. In view of the markedsimilarity of the two forms of the invention, it is believed adescription of the major portion of the invention shown in Figs. 4 to '7is unneces- The amount of resisting effort desired to oppose turningeffort of the valve IIS through the lever |41 and roller |50 by'reasonof the engagement of the plungercarried by the 'piston |52, can becontrolled' by the .areaofisaid piston and the rate of the power pistonspring |55 opposing the effort of the power piston |52. The outer end ofthe power piston |52 is subjected to at- .mospheric pressure through theport |11 controlled by the valve portion of the auxiliary piston I1I.The auxiliary piston |1| is subject -to the pressure on the upstreamside of the valve ||5 through the orifice or port |80, on one end to theatmospheric pressure through the port |1| on the other end.

The auxiliary spring |13 is calibrated to-hold the piston |1'| backagainst the cap |25, thereby keeping the port |11 open when thecarburetor valve, not shown, is in the wide open position, so that thedifferential pressure in the conduit |I0a and the atmospheric pressureis acting on the power piston |52 to resist the closing effort of valveI|6 through the roller |50 attached to the lever |41 as the roller |50contacts the end of the power plunger carried by the power piston |52.

The parts are in the position as shown in Fig. 4 when the carburetorvalve-not ,shown-K-is in a wide open position and the governor is incharge of the engine, but when the carburetor valve-not shown-is movedtoward the closed position and the pressure in the conduit |I0a on `theupstream side of the valve |I6 has reached the predetermined amount toovercome the resistance of the auxiliary spring |13, the auxiliarypiston |1| is moved to the position shown in Fig.

sary. The showing, however, herein does show the parts with thevalve--see Fig. 6-in what might be said to correspond to almost fullopen position. To this extent, Fig. 6 also is representative of theposition parts vof the invention shown in Figs. 1 to 3, inclusive, willassume when in that position. The present form of the invention,however, includes an auxiliary piston arrangement, to which referencevwillnow be had.

In the present form of the invention the body portion I 24 includesanother cylinder |10 and mounted therein is an auxiliary rpiston |1|suiti ably recessed as at |12-see Fig. 8-to receive an auxiliaryspringg|13 which bears against one effective face of the piston and oneeffective face of the cylinder and normally constrains the auxiliarypiston to the 'rightsee Fig. 8. The piston` has a stem portion |14 whichmounts a valve member |15. Themain power cylinder |5| includes a port|16 that provides communication 8 closing the atmospheric p ort |11making the effort of the power piston |52`negative as it tends to opposethe closing effort of thevalve IIS through the lever |41 and the roller|50. This is to compensate for the decrease in the turning effort of thevalve IIB due to the change in y thepressure and direction of the fuelmixture rn the conduit ||0a on the upstream side of the valve ||6`caused bymoving Vthe carburetor valve--g-not shown-away from a fullopen position to a partially closed position. Without y somecompensating device, the selected set speed between the cylinder |10 andcylinder |5|. There is provided a passage |11'between the cylinder |10and the exterior of the housing-portion |24.

This vents the auxiliary cylinder to the atmosphere. 'I'he size andforce of the spring |13 may be as desired or required.

An adjustable member |1|a is provided for adjusting the spring tension.This is similar to the adjustment |5|a for the tension of the powerspring |55. In this form of the invention, one end of the power piston|52 is subject to pressure in the conduit ||0a and on the downstreamside of the valve |I6 by means of the port |6'I vand |62, thesecommunicating by way of the chamber |29 closed by the cover |63 andsealed by the gasket |29a, the same being secured to the face of thewall |22 by bolts |6311, or the like.

or' predetermined governor speed could be exceeded by securing a properpositioning of the carburetor valve.

The piston |52, therefore, is responsive'to differential pressure withinthe Iconduit, ||0a and the atmospheric pressureand said piston is var.-ranged to oppose the closing effort of the valve IIB through the meansshown herein so as to.

make thesame effective over all' or any part of the working range of thegovernor to `assist in straightening out the force line as produced bythe valve I I6 and to reduce the governor speed if the force of thispower piston |52 is reduced or made negative by closing the atmosphericvent orbleed |11, this power piston as previously-stated, is subject topressure within the'conduit II-0a`on the downstream side of the governorvalve and is also subject to atmospheric pressure.

The auxiliary piston |1| is subject tothe pres--l sure within theconduit II 0a on the upstream side of the governor valve and issubjected also to atmospheric pressure, As previously stated, theforceofthis auxiliary piston is opposed by the calibrated spring |13,calibrated to hold thisA auxiliary piston in place until a predeterminedvacuum or atmospheric pressure has been reached, which generally is justabove thek full` a primary or 100 series.

- anchorage.

tension 224 in which is mounted the power piston cylinder communicateswith means of the opening 253 and thus is subject`to load governorspeedand when the carburetor throttle is in a wide open position and when thegovernor valve I i8 is in full control ofthe engine.

When the carburetor throttle .valve-not shownis moved toward a closedposition. the

- the pressure at that point. The opposite face of the piston is subjectto pressure of the fuel passage 2I0a by means of the ports 258, 259 and260.

on the governor valve i has been reduced, duc v to the change indirection of ow and lowering of the pressure above or on the upstreamside of the governor valve i I6.

In Figs, l0 to 12, inclusiveythere is illustrated a second basicembodiment of the invention. Nu-

merals of the 200 series wherever possible, are

employed to designate parts similar or identical to parts similarlydesignated by numerals of the Herein the invention is diierent, broadlyspeaking, in the following respects:

The specic type of anchorage for the sinusoidal faced member 239 isdifferent. Likewise the specic shape of the sinusoidal surface thereofdiffers from that shown at 45 and |48 in Figs. l and 8, respectively,being less acute. The link 'connected spring is differently anchored toits support. 'Ihe link is sequentially connected to the power piston asdistinguished from the pres-- sure type contact previously described.The valve means is directly associated with said linkage the end of thebody portion is of a different form,

and furthermore, the so-called power spring is omitted. The, points ofsimilarity will be obvious from an inspection of said figures, and inthis respect also this form of the invention is similar to the simplertype shown in Figs 1 to 3, inclusive, as distinguished from the form ofthe invention shown in Figs. 4 to 9, inclusive.

In this form of the invention, the spring anchoring member 231 issupported as at 23| by the eccentrically positioned member 236. This hasa surface 23Ia engaged by the tail portion 240 of the cam member 239mounted within the mountsthe roller 245 having sinusoidal surfaceengagement and one end of the link structure mounts the pin 242connected to one end of the spring 24|, the other end being connected asat 231b, the member 231 secured in adjusted position by the bolt 234which extends through the threaded aperture 233 in the side wall 222and.

connected as at 2 I2, are provided with the openings 2|3 therethroughfor usual adaptor type The body portion includes the ex- 252. The end ofthe cylinder 25| which receives said power piston, is closed by thepress fitted. dise 225.

The towerpiston is provided with a connecting rod 285 connected theretoas at 252a. The the passage 2I0a by Positioned in the passage 2I0a is apartition 286 that extends longitudinally of thesame, and the same issuitably slotted as at281 to permit movement of link 288 therein. Thelink 288 is pivotally connected as at 289 to the bracket 290 alsopivotally connected to the other end of the connecting rod 285 and saidbracket is'suitably secured as at 29| to a metallic resilient springtype vent or valve 292 suitably secured as at 293 to the lower end ofthe partition 286.'

Another fvalve 294 of similar character, is similarly secured at itslower end as at 295 to the adjacent wall of the passage 2|0a and nearits upper end mounts a bracket 298 which at 291 is pivotally connectedto the other end of the link 288 and-is connectedalso to one end of alink 298. The other end of said link 298 is pivotally connected at 299to the link 243. In this instance, the resistance of the spring typevalves cooperates with the other forces so that substantially the sameresult or broad typeof operation is obtained with this type of governoras is obtained with the other generic type of governor represented bythe two sub-generic forms illustrated in Figs. 1 to 3 and 4 to 9,inclusive.

In this third form of the invention, the sinusoidal faced member 239includes a spring anchorage 282 which is a portion of the wall 22| andforming with a suitable gasket and cover structure, the latter beingsecured thereto by bolts or the like, applied to the tapped holes 223for form ing a closed and sealed chamber.

Wall 22| includes an eye anchor portion 282 which anchors one end ofspring 283, the other end thereof being anchored as at 284 to the cammember 239. Th'e sinusoidal faced vmember thus f chamber 229 as at 238.-*I'he link structure 243 v is always constrained into contact with theadjustable construction 23I-236. In certain instances, if support 238for member 239 is not of clamping character, closing movement of roller245 will endeavor to tilt the member 239 which then will be opposed bythe spring *283.

The instant form of the invention differs from that previously describedin that instead of using a valve supported by a shaft associated withanti-friction means to keep friction within reasonable limits forsatisfactory performance incident to operation due to the small turningeffort produced by the offset or balanced valve means, the present valvemeans consists of two pieces of spring steel 292 and`294 as previouslydescribed and mounted and connected as described.

A relatively short movement of the linkage will close the conduit 2I9a.The stress on the valve means accordingly is relatively low and wellwithin the elastic limits thereof. The .arrangement is essentially arelatively frictionless control for the fuel now. The valve meansinherently includes a yielding arrangement so that the device is moresensitive or responsive to the varying pressures over any onepredetermined portion of its travel than the last or remaining portion.

The valve construction can be so constructed remaining portion of itstravel, with spring means to resist the closing effort of the valvemeans to any predetermined amount over its entire range of travel.

Reference will now be had to Figs. 13 to l5,

' and the high speed curve .of nonadjustable prior art devices speed.

inclusive. Fig. 13 is a chart of three curves of one form of theinvention. Curve A is for,.1,500 R.. P. M., Curve B for 2,000 R. P.M.and Curve C is for 2,500 R..l P. M. Fig. 14 is a chart of three curvesof the same engine at the three governed speeds for corresponding valvepositions, the other-coordinate being the corresponding vacuum in inchesof mercury. These curves are double lettered. From a comparison it isnoted the low speed curve at small degree valve positioning .has amarked sag from the points between and 30 degrees. This sag is lesspronounced in the intermediate speed curve and is very slight in thehighest speed curve. In other words, the invention curves may be said tosubstantially correspond to the vacuum curves for the samespeeds. Thismeans the invention is approximately isochronous with the engine.

Comparison of curves on chart, Fig. 15, with curves on chart, Fig. 14,shows that the same do not correspondingly conform. The low speed curveAAA does not sag as much as curve AA CCC sags more than curve CC. Thesame may also be said as to curve BBB relative to curve BB. So thatthese curves are quite different from the vacuum curves for the samespeeds and valve position.

i As. illustrated in Fig. 15, curvev is Aunmodified vertically for eachgoverned speed. As shown in Fig. 14, the force required to oppose theengine vacuum 'at different speeds varies for different valvepositionings and the corresponding curves are not substantially the samecurve correspondingly shifted but, are curves progressively flattenedfrom low to high Chart Fig. 13` also is of the latter character. Thesecur/es visually demonstrate that the presentadjustable cam inventionmore lclosely corresponds to the engine vacuum-corresponding speedcondition curves for like valvepositionings.

In other Words, in prior art devices it is required to employ differentcams for different engine speeds,` whereas with the present inventionone relatively stationary sinusoidal surfaced member can properlyfunction for substantially all engine speeds. In the prior art devicesthe cams are designed to extend the spring or increase the resistance agiven amount for each degree of valve movement and this ratio ismaintained at all engine speeds as the speed is raised or lowered byadjusting the spring only.

Thevfunction of the ber lin this invention is different for differentengine speeds as the ratio of acceleration of the spring to degree ofvalve movement is changed as the sinusoidal surfaced member position ischanged with th'e spring adjustment to secure dierent engine speeds tomore nearly conform to the resisting effort or force curves desired tosecure satisfactory performance at various speeds with the samemechanical set-up or specification.

These charts and the foregoing description re1- ative thereto is setforth for the benefit of those not especially highly skilled in thisart, since the advantages of the spring the present invention will notbe-so readily apparent to those last mentioned.

In order to increase the efficiency of the govvernor the parts may beanti-frictionally connected asillustrated in Figs. 16 to 19. r Thusmaximum power can be obtained from the piston at widev open position ofthe control valve means.

In these figures numerals of the four hundred Q acter.

accelerating means in series indicate parts identical or similar toparts illustrated in Figs. 1 and 2 and indicated therein bycorresponding numerals of the primary series.

In these figures the sinusoidal surfaced member engaging roller 445 isshown carried by T- shaped links 443` which at one end straddle thelever arm 441 and are con'nected thereto as at 448. Such connection isof anti-friction characthe .prior art,v basic sinusoidal surfacedmemter, as broadly indicated in Fig. 19. It is similar to theanti-friction connection indicated at 444a in Fig. 16. Member 444formsvthe vlink connection and sinusoidal surfaced member engagingroller pivot. The other ends of the links 443 are connected by member442 which constitutes the spring anchorage.

The lever 441 herein, however, includes a slot 4I48L to receive acorrespondingly formed end of shaft 4I4. as at 441b anda counterweight441% which may be adjustably weighted, is securedthereto asv at 44101.Arm 441 may include stop portion 4413.

This limits the arm travel in the counter-clockwise direction, see Fig.-16, by engaging the lower link 443.

by Washers 449b which cover central aperture' 450a in roller 450.`Between the roll-er and sleeve and the Washers are the anti-frictionballs 450i.

The several forms of the invention previously described may be similarlyconstructed without departing from the broad features of the invention.Fig. 16, however, does illustrate an arm which by experiment soA far hasbeen determined to give most satisfactory results. If the longitudinalaxis ofl slot 414 be extended and radii be projected through the slotcenter and the axes of 448 and 449, it has been found that if 448 liesapproximately 421/2 from the longitudinal axis described and 449 liesapproximately 45 therefrom in the opposite direction, best results` willbe obtained. This `manufacturing Adata is supplied for completeness ofdisclosure.

While the invention has been illustrated and described in great detailin the drawings and foregoing description, the same is to be consideredas illustrative and not restrictive in char- 'The several modificationsdescribed herein as well as others which will readily suggest themselves.to ypersons skilled in this art, all are considered to be within thebroad scope of the invention, reference being had to the appendedclaims.

The invention claimed is:

1. A governor for internal combustion engines including fuel supplypassage means; eccentri-l ized by the addition of an adjustame supportfor the sinusoidal surfaced member and an adjustable anchorage for thespringmeans, said sinu- I* soidal surfaced member and anchorage havingcooperating engagement, and a single means for simultaneously adjustingthe sinusoidal surfaced Herein the arm 441 is extended f meansoperation, said link means being connected thereto and the piston havingoperative connection with said arm, and by the addition of meansnormally constraining the piston toward a position corresponding toclosed valve position.

6. A governor as defined by -elaim 1 characterized by the addition of alever arm for valve means operation, said link means being con,-

-nected thereto and the piston having operative connection with saidarm, and means .normally constraining the piston toward a positioncorresponding to closed valve position, an adjustable support for thesinusoidal surfaced member and an adjustable anchorage for the springmeans,

said sinusoidal surfaced member and anchorage having cooperatingengagement, and a single means for simultaneously adjusting thesinusoidal surfaced member position and the spring means initialtension.

7. A governor as defined'by claim l characterized by the addition of alever arm for valve means operation, said link means being connectedthereto and the piston having operative connection with said arm, andmeans normally constraining the piston toward a position correspondingto closed valve position, and a roller therewith, an operating rollercarriedthereby, a link structure having one end pivoted thereto andhaving a yielding opposite connection, a follower pivotally supported bythe arm, and a i link engageable stop carried by the arm.

13. In a -governor structure, the combination of `a suction responsivevalve shaft, an arm rigid l therewith, an operating roller carriedthereby, a

link structure having one end pivoted thereto and having a yieldingopposite connection, a follower pivotally supported by the arm, andapproximately 871/2 from the operating roller connection thereto, and alink engageable stop carried by the arm.

14. In a governor for internal combustion engines and the like, thecombination with a fuel supply passage therethrough, valve means in thepassage and movable toward closed position by fluid flow operatingldirectly thereon, spring means normally constraining the valve meansto- Ward open position, a connection between the spring means and thevalve means, and a passage differential pressure'operable pistonoperatively associated with the valve means and normally constrainingthe valve means toward open position.

15. In a fluid operable governor forlinternal combustion engines, ahousing structure including a fuel passage therethrough, and a controlvalve therein and movable toward closed position by fluid flow operatingdirectly thereon, means carried by the arm and engaged by the piston.

8. In a governor for internal combustion engines and the like, thecombination with a fuel supply passage therethrough, valve means in thepassage and spring means normally constraining the valve means towardopen position, of a stationary sinusoidal surfaced member, a followeroperatively connected to the valve means, the movement of the followerbeing controlled by the stationary member and spring means, saidfollower being constrained by the spring means into sinusoidal surfaceengagement, and a passage suction operable piston operatively associatedwith the valve means.

r9. A governor as dene'd byclaim 8 characterized by the addition of anadjustable anchorage for the spring means, an adjustable support for thesinusoidal surface member, and a single means for simultaneously andconjointly adjusting the spring tension, the spring position and theoperative position of the sinusoidal surface member.

10. A governor as defined by claim 8, charac.- terized by the additionof an auxiliary piston and cylinder for first mentioned piston control.

11. In a governor structure, the combination of a suction responsivevalve shaft,-an arm rigid therewith, an operating roller carriedthereby, a link structure having one end pivoted thereto and having ayielding opposite connection, and a follower pivotally supported .by thearm, and approximately 871/2 from the operating roller connectionthereto.

v12. In a governor structure, the combination of a suction responsivevalve shaft, an yarm rigid connected to the valve for valve operation,other means responsive to fluid pressures upon opposite sides of thevalve, 'and cooperating with the first mentioned means for valvecontrol, and two passage forming means formed entirely within thehousing structure providing communication between the fuel passage atopposite sides of the valve and the second mentioned 'means whereby.

the fluid medium operative upon the second mentioned means` is nodirtier than that in the fuel passage.

16. In a fluid operating governor for an interna] combustion engineprovided with a fuel conduit and valve means adapted to control the flowof fluid fuel in said conduit and movable toward closed position byfluid flow operating directly thereon, the combination o f meansresponsive to pressure within said conduit, and means formingindependent-passages communicating with said conduit to control saidpressure responsive means, one of vsaid passages being subject to thepressure on the'engine side of said valve means and one ofsaid passagesbeing subject to the pressure -on the atmospheric side of said valvemeans to supply said passage forming means with clean air to control thefuel supply that is passing through said governor conduit.

17. In a differential pressure governor for an internal combustionengine having a. throttle, the combination with an-intake,an unbalancedgovernor valve therein always constrained toward open valve position, ofa pressure responsive means -responsive to the differential eflect ofthe suction in the intake at opposite sides of the valve and normallyconstraining 'said valve toward open position at all times, said meansbeing arranged for diminishing its constraint upon said valve inaccordance with closing'movement of the throttle ,from the wide openposition.

18. A governor as defined by claim 17, characterized by the differentialpressure responsive means having opposite faces subject to differentpressures. v

19. A governor as defined by claim 17, charthe combination with anintake, 'an unbalanced.

governor valve therein always constrained toward openv valve position,of a' pressure responsive means responsive to the differential eect ofthe suction in the intake at opposite sides of the valve and normallyconstraining said valve toward openposition at all times, said meansbeing arranged for diminishing its constraint upon said valve inaccordance with closing movement of the throttle from the wide openposition, the governor valve in closing having an increasing torqueincident lto fuel flow in the intake, and said ypressure reaA sponsivemeans having a corresponding increas.

ing compensating effectincident to the corresponding differentialpressure change due to the movement of the governor valve toward'closing 10 position.

RAYMOND HUFFORD.

